

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
   
   
   
     <%
   Integer id=(Integer)session.getAttribute("login");
   if(id==null){
	   
out.print("<script>alert('您没有登录');location='login.jsp'</script>");
	
	  
	   
	   return;
	   
   }
   %>